An unmanned helicopter has crashed in Belize over the weekend during trial flights for U.S. Special Operations Command. The A160T Hummingbird was testing foliage-penetrating radar when it crashed. This marks the second Hummingbird lost this summer; in July another crashed in California.

In all, this has been a bad summer for unmanned helicopter drones. In August, a Navy MQ-8B Fire Scout violated the airspace of Washington D.C. after controllers "lost link" with the craft. There will be more crashes and awkward lost-link episodes as UAVs proliferate in domestic airspace. Last month a new rule was published in the Federal Register that would require reporting accidents involving UAVs if someone is injured or killed, or the aircraft suffers major damage. The information will likely be used to create airspace-sharing rules.